Hi @CMooN,
In order to utilize another channel in the same FTM, it is necessary to initialize it like the previous channel. There might be a missed step starting up channel 3, resulting in no signal showing. The example "frdmkv11z_ftm_pwm_twochannel" shows how to initialize two channels in the same FTM. I hope you find this useful!
Could you please help me confirm this works?
Best regards, Julian